Device for assembling plates or other superposed pieces



J. J, BLANC Jan. 23, 1940. 2,187,929

DEVICE FOR AssEMBLING PLATES 0R OTHER sUPERPosED PIECES Filed June so.I1959 Patented Jan.

PATENT OFFICE DEVICE FOR ASSEMBLING PLATES 0R Y OTHER. SUPERPOSEDPIECES' Jean Julien Blanc, Paris, France Y Application June 30, 1939,Serial No. 282,125

` 11 claims.

Devices of this kind are already known comprising a rod having over apart of its length a diminished cross-section, the said rod cooperatingwith a finger slidable with respect to said rod and completing the partof the rod having a diminished cross-section in such a way as to form acomplete cross-section equal to the normal cross-section of rthe rod. l

For obtaining the sliding movement, the rod is fixed at one of the twoparts forming a housing which contains a compression spring tending toseparate the said both parts of said housing. For introducing the rodinto the holes of the parts to be assembled, the housing formed by thetwo parts is compressed by a special forked lever. By releasing saidforked lever after having introduced the rod into the holes, the nger isadvanced thus placing the device in position.

In the device of the kind described above, the rod is slidable withrespect to the finger which completes it, but is not rotatable withrespect to that finger.

The present invention has for its object inter alia a device of the kindmentioned above, in which the. rod may execute, besides the slidingmovement, a rotating movement with respect to said nger. This rotatingmovement which constitutes an essential characteristic of theinventionallows of Aintroducing more easily the rod into the holes of the piecesto be assembled or of drawing it back from them.

Other characteristics of the invention will appear from the followingspecification with reference to the accompanying drawing in which:

Fig. 1 shows the device of. the invention placed into the special forkedlever ready to be introduced into the holes of the parts to b eassembled Fig. 2 shows the device partly in section, the spring beingcompressed. Fig. 3 shows the device in position.

Fig.- 4 shows on a larger scale, a detail of Fig. 2, certain parts beingin section.

Fig. 5 represents an enlarged top View of a cross-sectional cut throughthe device illustrated in Fig. 2 in the plane IV--IV.

Fig. 1 shows the device placed into a forked lever and ready to vbe putinto position. 'I'he two parts 'l and 8 respectively of the housing,containingthe spring, are spread by the latter. Consequently, a rod Ioccupies the position in which it extends lbut little out of thehousing. The finger 4 is to be introduced into the holes of the piecesto be assembled.v

Fig. 2 shows the housing in the position in which .the spring containedin it is compressed 5 and in which the rod is, inposition in the holesof the pieces to be assembled. 'I'he housing formed by the parts 1 and 8which t into each other contains a strong spring I3. Said two parts areassembled by any appropriate means, e. g.

a sunk screw 9 iixed on the part 4 engaging a groove I0 on the part -'I.The rod is composed oftwo parts, of different diameters. I and 2respectively.

` The part 2 carries at its upper end a ring I6 l5 which applies itselfto a `disc I1 having a hole for the passage of the part 2 and beingsupported by a. tube I4 secured in any suitable way to the part 8 of thehousing. At an intermediate place, the part 2 is provided with twohelicoidal grooves 90 3 of relatively steep pitch for obtaining therotating movement of the rod as it will be explained below.

At its lowerv end, the part 2 carries a part I having a larger diameterthan the part 2. The 25 part I is limited, atV the top and at thebottom, by tapered portions I' and I." respectively. The intermediateportion of the part I has a file-like surface.` After the rod I--2 is inposition, the smallercross-section of the part 2 is complei9 mented bythe projection 5 of the :linger 4 carried by the base 6. i

As it can be seen on Fig. 5, the nger 4 surrounds nearly'completely thepart 2 of the rod. The cross-section of the finger 4 is a portion of a85 circular surface the periphery of. which follows substantially theoutline of the finger 4 and traverses in its imaginary part a point onthe -periphery of part 2 diametrically opposite the center point` of thecircular surface. The projection 5 40 substantially follows with itsinner surface the outer contours of the part I of the rod II-,--2.

The rotation of the rod is obtainedin the following manner: The part 2of the rodis provided with two helicoidal grooves of relatively ed steeppitch engaging two pins 2| (Fig. 4) carried by a ring 20. The lowersurfaces 23 of said ring which bears against ythe base `6 of the ngerisknurledv as Well as the corresponding portion of the base. When theforked lever I2 is com- 60 pressed, the stud I5 having -a spherical head.presses upon the upper face of the part ii-of the housing. The lowerpart 'I of the housing is provided with a shoulder II which appliesitself to a corresponding shoulder`of the forked f,

into the housing.- During this drawing back movement, the ring 2li bearsagainst a disc I 9 secured in any suitable manner (e. g. by means ofscrews 22) to a tubular piece I 8 fixed in any way upon the base 6 ofthe finger l.

-As the upper face of the ring 20 as well as the l corresponding undersurface of the ldisc I9 are smooth, the ring 20 will rotate while thepins.

slide alongr the grooves 3, without causing the rotation of the rod I-2.Ii' it is desired that the rod rotate both when coming out Aand whendrawn back, it is necessary to secure ring 20 to the Abase 6' omittingtheparts' I8`I9 and 22.

The device works as follows?v After having placed the device into theforked lever, the Vrod is brought into a positionV facing the holes,into which it has toibe introduced, e. g. rivet holes oftwo plates to beassembled. Then the operator compresses the forked lever pressing at thesame time in the longitudinal senseof the device. By this compression,the rod comes out of the housing executing at the same time a rotatingmovement which facilitates lthe entering of the rod into the hole. Thefile-like surface of the part I serves at the same time for cleaninggoil burrs which may be on the border of `the holes. When the portion I"has passed' through the hole, the plates bea against the shoulder25formed by the recess of the rod from the portion I" to the part 2.When then releasing the forked-lever, the expansion of the spring I3causes the part 1 of the housing'to go down, and also the finger 4 whichengages in the remaining portion of the holes unoccupied by the part 2of the rod. Finally, the lower face ofthe part 'I of the housing bearsagainst the upper plate thus securely holding together the pieces to beassembled.

For withdrawing device, the operator com-- presses the housing by meansofthe forked lever which forces the finger out of the holes causing saidfinger to slide along the rod remaining in position till the finger hasgone out.. Then, this- A"rod may be drawn back after disengagingtheshoulder 26 by a lateral movement.

. Other forms and applications of the invention will suggest themselvesto those skilled in the art.

What I claim as new is:

1. A temporary rivet comprising a rod, a first projection extendingtransversely from the first end of said rod, a second projectionextending vtransversely from said rod -and slidable with respeci',thereto at least substantially up to said -first projection, a fingercarried by said second hom together in the me dennen by said amanosecond projections, at least twope'rforated plates in perforatealignment. 2. FA temporary rivet comprising 'a rod, a rst metalprojection extending transversely from the first end of said rod, asecond projection extending. transversely from said rod and slidablewith respect thereto at least substantially up to said first projection,a nger of uniform cross-section carried by said secondprqjectionextending therefrom along said rod toward said first end, saidrod being rotatable with respect l-to said finger, a spring positionedand of a force sufficient to securely hold together in the bite definedby said rst and second projection at least two perforated metal platesin perforate alignment.

3. A temporary rivet comprising a rod, a rst projection'l extendingtransversely from the first end of said rod, a second projectionextending transversely from said rod and slidable with respect theretoatleast substantially up to said.

first projection, a finger carried by said second projection extendingv4therefrom along said rod toward the first end of said rod, said fingerdefining part of a cylinder in which the outermost edge of said rod issubstantially coincident with the projected cylindricalsurface,` saidrod being rotatable with respect to said, finger, a spring positionedand of.a force sufiicient to securely hold' together in thebite dened by.said projection and said collar at least two perforated 25 metal platesin perforate alignment.

4. A temporary rivet comprising a rod, a first projection extendingtransversely from the first end of said rod, a second projectionextending transversely from said rod and slidable with respect theretoat least substantially up to said iirst projection, a iinger carried bysaid second projection extending therefrom along said rod toward thefirst end of said rod, said rod being rotatable with respect to saidfinger, and means for bringing said projections into clamping positionwith sumcient force to securely hold together in the bite defined bysaid rst and second projections, at least two perforated metal plates inperforate alignment.

5. A temporary rivet comprising a rod, a rst -projection extendingtransversely from the first ders at the top and the bottom, a secondprojection extending transversely from said rod and slidable withrespect thereto, a finger carried by f said second projection extendingtherefrom along said rod toward said rst end, said rod being rotatablewith respect to said finger, a spring positioned and of a forcesuillcient to securely hold together in the bite dened by said first and`second projection at least two perforated metal plates in perforatealignment.

6, A temporary rivet in accordance with claim 5 in which said rstprojection, intermediate said tapered borders at the top andthe.bottomthere of, has a substantially flle-like-peripheral surface.

\ end of said rod and provided with taperedbor- 7. A temporary rivetcomprising a rod, a first second projections at least two perforatedmetall plates in perforate alignmentand means for rotating said rodwhile moving said nrst projection away from said nger.

8. A temporary rivet in accordance with claln 'I in which said firstprojection has`a substantially le-like peripheral surface.

9. A temporary rivet comprising a rod, a rst projection extendingtransversely from'the rst end of said rod, a second projection extending16 transversely from said rod and slidable with respect thereto, a ngercarried by said second projection extending therefrom along said rodtoward the first end of said rod, said finger deiining part of acylinder in which the outermost edge of said rod is coincident with theprojected cylindrical surface, a spring positioned and of a forcesuicient to securely hold together in the bite dened by said first andsecond projections at least two perforated metalpiates in perforateaugment and means for rotating said rod while ger. y

10. A temporary rivet in accordance with claim 9 in which said firstprojection has a substantiaily ie-iike peripheral surface.

11.- A temporary rivet in accordance with claim 9 in which said rstprojection defines a tapered end having a substantially file-likeperipheral surface.

JEAN JULIEN BLANC.

moving' said first projection away from said iin-

